I didn,t know if you meant blues tunes that contained just whistling without vocals throughout or just tunes that included whistling but Kim Wilson whistles on a tune called Poor Boy which is featured on they,re 4th release I believe called T-Bird Rhythm.It definately adds a nice touch to the song with a nice reverb added.
Many years ago, in the mid 70s, the Climax Blues Band had an album--and I had the album--where they covered an old Mississippi blues about teaching a bird to sing. That song had whistling. "I have a bird to whistle, and I have a bird to sing."
The song is called "Losin' the Humbles." (I just tracked it down):
Just a heads up on whistling blues/americana style that was posted today on H-L from Trip Hendersons band called The Whistling Wolves.(just posted on you tube)I believe he,s going to be a the Hill Country bash in the spring.Just thought I,d give you the heads up.
The two tunes that always end up coming out when I whistle is J. Giles Centerfold and the Andy Griffith theme song. Depending on the style of blues Centerfold might pass. Andy Griffith could make a good on stage joke tune. Guns and Roses uses whistling and I'm not sure if the birds on The Beatles 'Blackbird' are whistles. That's the whole extent of all the whistling songs I can think of.